Where Puducherry's four regions sit on the map of South India
Background
The four regions of the Union Territory of Puducherry lie scattered across South India. Puducherry town is about 135 km from Chennai Airport and is bounded on the east by the Bay of Bengal and on the other three sides by Tamil Nadu. Karaikal lies about 130 km south of Puducherry on the East Coast. Mahe is on the Malabar coast on the Western Ghats, surrounded by Kerala, and is about 70 km from Calicut Airport. Yanam adjoins the East Godavari district of Andhra Pradesh and is about 200 km from Visakhapatnam Airport.
Puducherry from Chennai Airport:
About 135 km
Karaikal from Puducherry:
About 130 km south
Mahe from Calicut Airport:
About 70 km
Yanam from Visakhapatnam Airport:
About 200 km
Why it matters for exams: Map-based questions on which State surrounds each Puducherry region are among the commonest Kerala PSC and UPSC items on this Union Territory.
Kerala PSCUPSC
In plain words
Malabar coast South-western coast of India — The Arabian Sea coastline running along Kerala and parts of Karnataka.